The horn, uniquely welcome in both the brass and the woodwind families, is a brash but finicky device: for centuries the official instrument of the hunt, it is also capable of melting lyricism. The four virtuosos of Genghis Barbie, which calls itself “the leading post post-feminist feminist all-female horn experience,” give that heritage an irreverent post-classical twist. They’ll offer an “Ugly Holiday Sweater Party” at Miller Theatre on Dec. 11, performing tunes both goofy (“All I Want for Christmas Is You”) and solemn (“O Come, O Come Emmanuel”).